I am studying for a first year undergraduate genetics exam, my teacher has provided us with 20 multiple choice questions as a very general preparation for the 60 MCQ in the exam.

I have done some of them already, while others are not as easy for me. I'm gonna post the whole test here anyways, if you know the answer to some of the questions feel free to post them. By no means I am asking you to solve the whole test.

Thank you in advance, my classmates were not very helpful.

1. In the lac operon of Escherichia coli

A. A null mutation in Lac I prevents expression of beta-galactosidase

B. Mutations in Lac O result in constitutive expression of beta-galactosidase

C. Lac O encodes a trans-acting factor

D. The Lac I gene is constitutively expressed

E. The Lac I gene is induced by allolactose

2. The analysis of morphogenesis in bacteriophage T4 showed that:

A. Capsid assembly is a linear pathway

B. Phage tails have to be made before phage heads

C. Tail fibres are the last components to be added

D. Heads are assembled before DNA is inserted into them

E. Gene products are involved that are not included in the structure of the capsid

It's not a question of morality; it is about you learning/understanding. If you know some of the answers (as you say), then why don't you post them and why you think that is the answer? It may be that you are incorrect in your assumptions, or that there is an expanded answer that you would find useful, which we could then provide.

With your posit as it is, I could randomly assign letters and supply those as answers - and you could take those as the correct answer (or not), leaving you no better off... my aim was to help, but if you don't want help, then I'm happy to ignore this post.

It's not a question of morality; it is about you learning/understanding. If you know some of the answers (as you say), then why don't you post them and why you think that is the answer? It may be that you are incorrect in your assumptions, or that there is an expanded answer that you would find useful, which we could then provide.

With your posit as it is, I could randomly assign letters and supply those as answers - and you could take those as the correct answer (or not), leaving you no better off... my aim was to help, but if you don't want help, then I'm happy to ignore this post.

Ok, these are my answers, Green for true, Red for false.

1. In the lac operon of Escherichia coli

A. A null mutation in Lac I prevents expression of beta-galactosidase

B. Mutations in Lac O result in constitutive expression of beta-galactosidase

C. Lac O encodes a trans-acting factor

D. The Lac I gene is constitutively expressed

E. The Lac I gene is induced by allolactose

2. The analysis of morphogenesis in bacteriophage T4 showed that:

A. Capsid assembly is a linear pathway

B. Phage tails have to be made before phage heads

C. Tail fibres are the last components to be added

D. Heads are assembled before DNA is inserted into them

E. Gene products are involved that are not included in the structure of the capsid

Well, and now those you are not sure of, try to explain how far did you go in finding answers for them. Take it maybe by a single question.
For example 6. Transposons, why are you not able to select correct and incorrect answers, did you read some textbook containing some information about transposones?

Are you unsure about some of the statements? Why? Plase elaborate.

We can help you by guiding to correct answer, but for example in this case, you can open even wikipedia and be able to decide already. So either you don't no a think about them, so you should look it up, or you did, but you are not sure. With that, we can help.

Our country has a serious deficiency in lighthouses. I assume the main reason is that we have no sea.